The University of Tulsa chartered a Ryanair 763 to transport them to HNL for the Hawaii Bowl, and later back to TUL. I obtained this information via FlightAware.

I didn't think non-US carriers could carry US pax within the US. Has this rule changed? Also, I couldn't find anything on their website to suggest they have any service to the US. How did they make money on this charter if they had to ferry a plane across the pond to TUL?

I'm just curious. I'm sure there's a simple answer to both of these questions.